Any merit to this?

[markweatherill]

I love how vague this is! It's hardly an 'Instructable' more like a 'Suggestible'.
But is it a joke after all?

[JRMichler]

Originally Posted by ecomodded

JR I Believe the pressure could burst a seam / line with his rigged up tire pump as well let alone just pressurizing it , what hazard to put it mildly.

Way back when, I soldered a couple tin cans together, soldered in a piece of copper tubing, and connected the result to an air compressor. I was at least smart enough to put the tin cans inside a garbage can, planks over the top, and an anvil on the planks. Turned on the air compressor, and KABOOM. Bounced the anvil and blew all the dust out of the garbage can. My mother, on the second floor, thought for sure she had a dead kid in the basement. The cans were ripped into several pieces.

I tried again with a gallon can, but that just stretched and pulled a seam open. No boom.

[oil pan 4]

Originally Posted by ecomodded

What a Lark , the fuel gets all the oxygen when being sprayed threw injectors (about 45psi) or Jets on Carburetors ( 4-15 psi est.)

I did not see how many psi he uses for his pressurizing ( fail ) experiment , regardless of what psi he apparently used it would do nothing other then feed the fuel faster for a quicker drain, if anything at all.


Drill into the fuel tank ? now that's good advice..

Actually carburetors run essentially 0 psi.
The very common 4.5psi of fuel pressure just gets the fuel up into the carburetor bowls.
The fuel bowl float or floats regulate fuel level in th bowl.
If the float or orifice some how fail or if the fuel pressure is too great fuel just starts dumping into the engine through all these little passage
There it sits at atmospheric pressure untill the fuel is drawn through a jet.
The only fuel that developes any pressyre once it reaches the bowl is fuel that gets pushed through the accelerater pump.

[stovie]

The whole using pressure in the tank makes some sense to me(other then the whole vapor+oxygen=explosion part) from what I understand having higher pressure in the lines will help with atomization of the fuel by causing the injectors to spray a finer mist. If you use a compressor it actually would require less power to pressurize the fuel system because the air at 35psi would expand to maintain a reasonable pressure therefore reducing some of the load on the alternator. However the tank would have to be sealed and I'd use nitrogen instead of a compressor to avoid exploding!! If you had a 10 gallon air tank in the trunk with nitrogen gas at 150psi and the fuel tank pressurized to say 35psi you wouldn't need a fuel pump at all.

[RobertISaar]

35PSI in the tank would end up as 35PSI in both the fuel feed and return line... no real flow of fuel would occur except for the replacement of that which is emptied by the injectors, essentially making it a non-return style fueling system, which has its downsides.

[stovie]

And what would that be??? just curious is all!!

[RobertISaar]

relatively low pressure(for fuel injection) and returnless is asking for vapor-lock.

also consider that you'll need to figure out some kind of magic for the tank cap... it's vented to allow air to be drawn into the tank so that a vacuum isn't created and stops fuel from flowing. with a highly pressurized tank, the cap is either going to vent all of the pressure or all air that gets into the tank is going to have to come from the compressor.

also keep in mind, running a static fuel pressure will cause significant changes to fuel flow with changes in manifold pressure.